Knife blade



FIG. 1 is a top plan view of a knife blade with the knife handle depicted in phantom lines which forms no part of the claimed design for this invention;

FIG. 2 is a left side elevational view of the knife blade of FIG. 1, the right, opposite side of which is a mirror image thereof;

FIG. 3 is a front elevational view of the knife blade of FIG. 1, of which the rear view is a mirror image thereof; and,

FIG. 4 is a bottom plan view of the knife blade of FIG. 1.

The broken lines shown are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a knife blade, as shown and described. 